<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <script>
        // 交换两个变量
        var num1 = 'pink';
        var num2 = 'yellow';
        var temp;
        temp = num1;
        num1 = num2;
        num2 = temp;
        console.log(num1, num2);
    </script>
</head>

<body>

</body>

</html>